package xyz.moxj.sp11.fallback;

import org.springframework.cloud.netflix.zuul.filters.route.FallbackProvider;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.client.ClientHttpResponse;
import xyz.moxj.sp01.util.JsonResult;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;

public class ItemFB implements FallbackProvider {
    //要返回service-id
    //表示这个降级类,是针对哪个服务进行降级
    @Override
    public String getRoute() {
        return "item0service";
    }

    @Override
    public ClientHttpResponse fallbackResponse(String route, Throwable cause) {
        //返回降级响应
        //封装response响应
        return new ClientHttpResponse() {
            @Override
            public HttpStatus getStatusCode() throws IOException {
                return HttpStatus.OK;
            }

            @Override
            public int getRawStatusCode() throws IOException {
                return HttpStatus.OK.value();
            }

            @Override
            public String getStatusText() throws IOException {
                return HttpStatus.OK.getReasonPhrase();
            }

            @Override
            public void close() {

            }

            @Override
            public InputStream getBody() throws IOException {
                ByteArrayInputStream stream = new ByteArrayInputStream(
                        JsonResult.err().code(400).msg("调用商品服务失败").toString().getBytes());
                return stream;
            }

            @Override
            public HttpHeaders getHeaders() {
                HttpHeaders headers = new HttpHeaders();
                headers.setContentType(MediaType.APPLICATION_JSON_UTF8);
                return headers;
            }
        };
    }
}
